Thanks for that suggestion! I am very new to ARs let alone assembling this jigsaw puzzle but my friend lent me his lower to test my upper/build the lower. Pinning the upper sounds like a great guide.

anytime!

on the swiss cheese thing: once you got it all together and tested up ... then you can go back and do a design with the holes or your initials or the before mentioned skeletonized deal.. i like the same shaped holes in the lower and magwell that are in fore stocks you buy...

like on the ar57.. the ovals.. or if your fairly creative? you can dimple it like a golf ball. :-)